Hammer-press.



E. H. WRAY & W. J. HAGMAN.

HAMMER PRESS.

APPLICATION FILED AUG. 8, 1912.

1,084,054, Patented Jan. 13, 1914.

' Edam/rd ZU/"cqy William. Jfiayman.

Witnesses: I Inventors QM QMM LU. 552a Attorney EDWARD H.

WRAY AND WILLIAM J. HAGMAN, OF PHILADELPHIA, PENNSYLVANIA,

ASSIGNORS TO 'NILES-BEMENT-POND CDMPAKY, OI JERSEY CITY, NEW JERSEY.

HAMMER-PRESS.

Specification of Letters Patent.

Patented Jan. 13,1914.

Application filed August 8, 1912. Serial No. 713,991.

To all whom it may concern:

Be it known that we, EDWARD H. WRAY and WILLIAM J HAGMAN, citizens of the United States, residing at Philadelphia, Philadelphia county, Pennsylvania, have invented certain new and useful Improvements in Hammer-Presses, of which the following is a specification.

This invention pertains to improvements in that class of forging machines involving a hammer, actuated by steam or other elastic fluid, for striking impactive blows upon the work, together with a hydraulic press arranged to produce powerful squeezing pressure upon the work.

The present invention will be readily understood from the following description taken in connection with the accompanying drawing which is a vertical section through the hammer and press cylinders of a hammer-press exemplifying our invention.

In the drawing: 1', indicates a portion of the frame of the hammer-press, which frame may be of the character usual in machines of this closs ofsteain-hammers: 2, the cylin' der of the steam-hammer, the term steam being used as typical of any suitable elastic fluid for operating the hammer: 3, the steam-chest, connected by ports with the up per and lower ends of the steam-cylinder as usual in steam -hammers: 4, a valve, adapted to be operated as usual in steam hammers, the valve serving to admit steam to and exhaust it from either end of the steam-cylinder. 5, the steam-inlet toihe steam-chest: 6, the exhaust-outletfrom the steam-chest: 7, the steam-piston working in the steam-cylinder: 8, the steam piston-rod, 9, the hammer-head carried by the lower end of the steam-piston-rod and adapted to slide in vertical guideways as is usual in steam-hammers: 10, the hammer-die secured as usual to the hammer-head: 11, the anvil with which the steam-hammer cooperates: 12, a hydraulic press-cylinder disposed vertically alongside the steam-cylinder: 13, a water inlet connection to the upper end of the hydraulic-cylinder this water inlet connection being adapted for communication through. suitable controlling valves with the source of supply of water which is to operate the hydraulic-pressrl l, the hydraulicpiston working in'the hydraulic cylinder:

15, the hydraulic piston-rod: 16, the hydraulic press-head carried by the lower end of the hydraulic piston-rod, and adapted to slide in suitable vertical guideways: 17, the hydraulic press-die secured to the hydraulic press-head and cooperating with the anvil 11; and 18, a conduit leading. to the lower end of the hydraulic cylinder from the source of steam supply, the illustration showing this conduit as receiving its steam from the steam-supply connection to the steam-chest.

Under the control of valve 4 the steamhammer may be operated as usual in steamhammers, and at the same time steam entering the base of the hydraulic cylinder through conduit 18 exerts a constantly upward pressure on the hydraulic piston and maintains the hydraulic press-head and its die in elevated position. If water, at comparatively low pressure he admitted above the hydraulic piston, through connection 13, the hydraulic piston and 'presshead will be moved down into contact with the work, the downward movement of the hydraulic piston displacing steam under the piston and forcing it back into the steam main or source of steam supply. has made contact with the work then, through the connection 13, water at high pressure may be admitted to the hydraulic piston, thus forcing the hydraulic-head and die down upon the work with enormous- ,pressure'and"producing upon the work a squeezing action of high importance in certain classes of forging work. In some uses of hammer-presses the descending movement as well as the squeezing pressure of the hydraulic-die is produced by water at heavy pressure, as produced, for instance, by an accumulator and in this case the steam acting under the hydraulic piston need not be exhausted but may find its way back to the source of steam supply. In other uses of hydraulic presses the lowering motion of the hydraulic-die is effected by water at comparatively low pressure, the ultimate squeezing action being later produced by water at high pressure as from an intensifier. Our present invention lends itself to either system for the operation of hammerpresses.

A piece of work to be operated upon, hav- When the hydraulic die ing been suitably heated, is laid upon the anvil, which anvil is common to the hammer-die and the hydraulic press-die. Then by suitably shifting the work upon the anv11 it may be sub ected to either the impactive blows of the steam-hammer or to the squeezing action of the hydraulic press, and the work in thus being subjected to action by the alternative instrumentalities may be placed alternately under the dies, or the work of either die may be concentrated upon it to the exclusion of the other die. When hammering is to be done it is practicable to locate the work and then emplo' the press to clamp it firmly for a period and when pressing is to be done the hammer may serve in holding the work, and when the hammer is in use without the aid of the press the press-die is held up out of the way, and when pressing is done, without the aid of the hammer, the hammer is held up out of the way.

In forging with steam hammers or combined hammers and presses, the pieces are often of great weight, weighing many hundreds of pounds and require to be supported by a crane and to be worked promptly while at the proper high heat. In operating on a given piece wh1le at proper forging heat, some of t e work calls for the impactive blows of t e hammer and other work for the powerful squeeze of the press, and the shifting from one action to the=other must be done with quicknes and the work must be accurately and firmly held. In the present device where the squeezing press and I the strikingnlminmer work on practically the same anvil, t-he w'ork may be presented to the hammer or press as needed or to both successively.

We claim 1. A hammer-press comprising, a vertical steam-cylinder, a vertical hydraulic cylinder alongside the same, a piston in each cylinder, a piston-rod connected with each piston, a head carried by each piston-rod, a die carried by each head, an anvil below the dies, means for supporting the hydraulic piston in its upward position a steam-valve controlling passages for the flow of steam to and from above and below the steampiston, and a conduit for admitting liquid under pressure above the hydraulic piston, combined substantially as set forth. r

2. A hammer-press comprising, a vertical steam-cylinder, a vertical hydraulic cylinder alongside the same, a piston in each cylinder, a piston-rod connected with each piston, a head carried by each piston-rod, a die carried by each head, an anvil below the dies, a steam-valve controlling passages for the flow of steam to and from above and below the steam-piston, a conduit for admitting liquid under pressure above the hydraulic piston, and a conduit connected with the base of the hydraulic cylinder and adapted to apply a pressure of steam below the hydraulic piston for the purpose of raising or holding the hydraulic piston in elevated position, combined substantially as set forth.

EDWARD H. WRAY. WILLIAM J. HAGMAN. Witnesses:

WM. B. CORNELL, R. RAYMOND PORTER. 

